@article{ref1,
title="Prevalence of psychiatric problems in older adults",
journal="Psychiatric Annals",
year="1990",
author="Cohen, Gene D.",
volume="20",
number="8",
pages="433-438",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0048-5713",
doi="10.3928/0048-5713-19900801-07",
url="http://dx.doi.org/10.3928/0048-5713-19900801-07"
}